GREEN TIRE INSERTING METHOD AND APPARATUS OF TIRE VULCANIZING MACHINE

摘要

PURPOSE:To enhance the quality of a vulcanized tire by constituting the title apparatus of a slide and link mechanism for performing the expanding/contracting operation of a sector expanding the bead part of a green tire to hold the same in a round state and a liftable chuck for inserting the bead part of the green tire held on the sector in an expanded state in the bead ring of a tire mold. CONSTITUTION:Six sets of chucks 17 and sectors 15 are opened to expand the upper bead 20a of a green tire 31 so as to be held to an out-of-roundness state outside the sectors 15. The upper bead 20a of the green tire 31 is drawn up by a bead lock lift cylinder 11 to be inserted in an upper bead ring 20 by the leading ends of the chucks 17. The falling of the bead lock lift cylinder 11 is stopped at a place where the sectors 15 become the position above a lower bead ring 32 and the lower bead 32a of the green tire 31 is expanded into an out-of-roundness state by the sectors 15 provided to the lower parts of the chucks 17. The lower bead 32a of the green tire 31 is pushed in the lower bead ring 32 by the leading ends of the chucks by the falling force of the bead lock lift cylinder 11 in such a state that the chucks 17 are expanded. Then, the raising of the bead lock lift cylinder 11 and the closing operation of the chucks are performed.